Machine



5 Sheets-Sheet 1.

(No Model.)

J. HEGGAN.

SEWING MACHINE.

No. 405,776. PatentedJune 25, 1889'.

IIVVENTO/I:

WITNESSES W/ad,

.4 TTORNEYS.

N. PETERS. PMoL'rlJvogu-npher. Washlngtnn', n. c,

(No Model.) 5 Sheets-Sheet 2. J. HE-GGAN. SEWING MACHINE.

No. 405,776. Patented June 25, 1889.,

lA/I/E/VTOH:

By M441 ATTORNEYS.

m r'rrzns. mwum mr. Washingtm, n. r.

(N0 Mddel.) 5 Sheets-Sheet a.

Y J. HEGGAN.

SEWING MACHINE.

N0. 405,776. Patented June 25, 1889.

H WITNESSES: INVENTOR:

. W N W a BY M ATTORNEYS.

N. PETERS. Puma-umber. wamin aw. D. c

(No Model.) 5 Sheets-Sheet 4.

J. HEGGAN.

SEWING MAGHINE.

No. 405,776. Patentd June 25, 1889.

WITNESSES: & INVENTOR:

A TTUH/VEYS.

N. PETERS. PhoM-Lilhognphu, Wmhlnglnn. D. C.

(No Model.) 5 Sheets-Sheet 5. J. HEGGAN.

SEWING MACHINE.

No. 405,776. Patented June 25, 1889.

WITNESSES: 1 f' X IVVENTOR:

"632W By AUOR/VEYS.

N. FFI'EHS. PhOiO-L'nhognpbcr. WaNngtun. D. C.

UNITED STATES PATENT OFFICE.

JAMES HEGGAN, OF PERTH AMBOY, NENV JERSEY, ASSIGNOR TO S. M. SOHVVAB, JR, & 00., OF NEIV YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 405,776, dated June 25, 1889.

Application filed June 28, 1888. Serial No. 278,405. (No model.) Patented in England March 14, 1887, No. 3,836.

To all whom it may concern.-

Be it known that I, JAMES HEGGAN, of Perth Amboy, in the county of Middlesex and State of New Jersey, have invented certain new 5 and useful Improvements in Sewing d Machines, (patented in England March 14, 1887 No. 3,836,) of which the following is a full,

clear, and exact description.

The invention has for its object certain improvements in sewing machinery for the pro duction of French vein or hem-stitch; and it consists in the parts which will be hereinafter described, and pointed out in the claim.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure I is a front elevation of the improvement. Fig. 2 is a plan view of the same. 20 Fig. 3 is an end view of the same. Fig. at is a rear view of the parts employed for-communicating motion from the driving-shaft to the hook or looper shaft. Fig. 5 is an enlarged side view of the feed-plate and certain adja- 2 5 cent parts shown in section. Fig. 6 is an enlarged plan view of the same. Figs. 7 and S are opposite end views of the stud or countershaft, showing the cams carried thereby. Figs. 9 and 10 are inner face views of the 0 cams 011 the drivingshaft. Figs. 11 and 12 are side and end views, respectively, of the bobbin-carrier. Fig. 13 is a face view of the hook or looper. Fig. 14 is a side view of the said hook and its shaft. Fig. 15 is an e11- larged perspective view of the stitch formed by the sewing machine. Fig. 16 is an enlarged plan view of the stitch, and Fig. 17 is an enlarged inverted plan view of the same.

The frame A of the sewing-machine is secured on a suitable base and carries on one side a driving-shaft O, which extends from the front to the rear. The rear end of the driving-shaft O is provided with fixed heads C and 0 each of which is provided with a crank O" or C said cranks standing at righta11- gles to each other. The front end of the drivment of the wheel by hand whenever desired. On the drive-shaft O is also secured a smaller cam-wheel E, having in its face a cam-groove E. A gear-wheel F and a grooved pulley F are also fixed on the drive-shaft C.

On the frame A and parallel with the driveshaft O is mounted to rotate a short shaft G, carrying a gear-wheel G, which meshes into the gear-wheel F, the former having three times as many teeth as the latter. On the rear end of the shaft G is secured a bevelfaced cam G and on the front end of the said shaft is fastened a cam-wheel G provided in its face with a cam G. (See Fig. 7.) The periphery of the cam G2 is provided with a depression G The hook or looper shaft I is mounted at one side of the machine in a position parallel with the drive-shaft O. The rear end of the shaft I carries two crank-heads I and I each provided with a crank I or I, respectively, standing at right angles to each other. The relative position of these cranks corresponds with the position of the two cranks C and C on the inner end of the drive-shaft O. A rod J is connected by its respective ends with the cranks O and I and a similarrod J has its ends engaged respectively with the cranks C and I. On the front end of the shaft I is secured a hook or looper I, in the head of which is formed a recess, into which fits a casing K, holding the usual bobbin. A short arm or lug K is formed in the front of the casing K, which latter is also provided with an opening K, through which passes the thread K when unwound from the bobbin.

A fixed pin K (see Fig. 1) engages the lug K so as to prevent the bobbin-casing K from turning. A spring-arm K" (see Fig. 3) holds the bobbin-casing K on its seat on the hook or looper I.

The work-plate I. is provided with a slot L (see Fig. 5) for the reception of the serrated feed-plate L secured on the outer end 5 of a feed-lever pivoted at its inner end at L to the sliding arm L working in suitable bearings over the hook or looper shaft, as shown in Figs. 5 and G. In the arm L is formed a recess M engaged by a pin 'm, formed on a lever M, pivoted at M to the frame A. On the end of the lever M, extending from the pin m, is formed an extension M (shown in dotted lines, Fig. 2,) on which is secured one end of a spiral spring Mflfastened by its other end to the work-plate L. The other end of the lever M is provided with a slot M arranged parallel with the face of the cam G and containing a movable block M provided with screw-binding means M to hold the said movable block M in place on the slotted end of the lever M. A roller M is journaled in the said block M and engages the face of the cam G by the action of the spiral spring M. This device serves to reg- 4 ulate thelength of the stitch, as the block M can be adjusted in the slot M of the lever M, so as to increase or diminish the length of the said lever M, thereby lengthening or shortening the stroke of the sliding arm L carrying the feed-plate L To the frame A is pivoted at N a lever N, the outer end of which rests under the arm L as shown in Fig. 5. The inner end of the lever N is provided with a roller N (shown in dotted lines, Figs. 1 and 2,) which engages the periphery G 9 (see Fig. 2) of the beveled cam G The outer end of the lever N holds the feed-plate lever up until the roller N drops into the depression G5 of the cam' G When this takes place, the lever N swings with its outer end downward, so that the feed-plate lever with the feed-plate L swings downward, the serrated top of the feed-plate then passing below the top of the work-plate.

On the main frame A is formed the fixed arm 0, which carries at its outer end the fixed part 0 and 0 on which is pivoted the head 0 by means of a pin 0 In the head 0' is held to slide the needle-bar 0 carrying at its lower end the needle 0 To the frame A is pivoted at 0 a lever 0 the outer end of which is provided with a slot. engaged by a pin 0 held on the needle-bar O The other end of the lever O is provided with a roller 0 engaging the :c'am-groove D in the cam-wheel D. Astop or pin O is secured on the fixed part 0 and serves to limit the inward movement of the swinging head 0'. A bent arm P has one end jointed at P to the head 0, while the other end is provided with a pin P engaging a slot P in the upper end of the lever P. This lever is pivoted to the frame at P and is provided with a roller P, which en gages the periphery of the cam G. A spiral spring P has one end engaged to the frame, and the other end engaged to the lower end of the lever P, so as to hold the roller P against the cam G The take-up lever Q is pivoted at Q to th frame, and has its lower end provided with a roller Q engaging the cam-groove E, formed in the cam-wheel E. The upper end of the lever Q engages and actuat'es the needlethread Q as it comes from the spoolQ The arrangement of said cam is such as to momentarily arrest the action of the lever Q.

' The presser bar and foot are arranged in the fixed part 0 and 0 and operate over the work-plate in the usual manner.

The operation is as follows: Power is imparted to the machine through the medium of the pulley F. The rotary motion of the driveshaft O and its cam-wheel D reciprocates the needle-bar O and the needle 0 through the motion of the lever 0 Rotary motion is imparted to the looper-shaft I by means of the rods J and J and the crankpins, and the speed of the said shaft conforms to the speed of the drive-shaft, so as to produce the revolution of the shaft I andits hook for each stroke of the needle 0 The serrated face of the feed-plate L projects up ward through an opening in the work-plate, and the said feed-plate is reciprocated by means of the sliding arm L rocking lever M, and beveled cam G The arrangement is such that when the feed-plate L has moved rearwardthat is, from the operator sitting in front of the machine-the first stroke of the needle takes place. Then the feed-plate moves forwardthat is, toward the operator-after which the needle makes the second stroke, and

then the feed-plate moves again rearward.

During the next third stroke of the needle the feed-plate drops by the roller N engaging the depression G of the cam G At the same time the feed-plate is moved forward without engaging the cloth on the work-plate. The feedplate,when now in its outermost position, rises and again engages the cloth, and then moves rearward, after which the next or first stroke of the needle again takes place, as above described. Thus during three full IOO strokes of the needle the feed-plate L carries 4 the cloth once forward and twice successively rearward. The first and. second strokes of the needle take place when the swinging head 0' is in its left-hand position; but when the needle makes the third stroke the head-O swings to the right, so as to place the third stitch alongside the first one. After the first stroke of the needle, as above described, the cloth moves forward, so that the'second stitch is formed directly on the first stitch of the preceding set of stitches. The swinging side movement is imparted to the needl'e0 and its head 0' through the medium of the arm P, lever P roller P and cam G. This side movement of the head and needle takes place simultaneously with the dropping of the feed-plate, so as to produce the stitch hereinafter more fully described. The straight or flat part of the cam D -(at d, Fig. 9) engages the roller 0 when the needle is at the lower point of its stroke, so as to arrest and hold the needle and insure the engagement of the hook or looper with the thread.

The stitch before mentioned is more fully shown in Figs. 15, 16, and 17. When the needle 0 with its thread Q first descends through the cloth, it forms, with the looper I and its thread K the loop a, after which, when the needle is withdrawn, the feed-plate L moves the cloth forward, so that when the needle descends it forms, with the looper I and the threads Q and K the loop I). When the needle is withdrawn, the feed-plate L moves the cloth rearward, and the head 0' 110w swings to the right, so that the needle in descending passes through the cloth and forms a loop 0 with the looper I and the threads Q and K alongside the loop a. lVhen the needle is now withdrawn, the feed-plate L moves the cloth rearward,and the head 0' swings to its former position, so that the needle now forms, with the looper and the threads, a loop a in front of the loop a. lVhen the needle now withdraws, the feed-plate L moves forward, so that the needle in descending forms, with the looper and the threads, a loop f alongside the loop a, previously described. lVhen the needle is now withdrawn from the cloth, the feed-plate moves rearward, and at the same time the head 0 swings to the right, so that a new loop a is formed in front of the loop 0 and alongside the loop a. The above-described operation is then repeated-that is, the next loop a is formed in front of the loop a'-after which the loop f is formed alongside the loop a, and then a loop 0 is formed in front of the loop a and alongside the loop 0. &c.

It is understood that the swinging of the head 0, carrying the needle, and the motion of the looper in connection with the forward and backward motion of the feed-plate produce the French vein or hem-stitch above described. The length of the stitch that is between the loops a a a &c., depends on the adjustment of the friction-roller block M in the slot M in the lever M, as before described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-.

In a sewing-machine of the character hereinbefore described, the combination, with the pi votally-mounted vibrating head, the needlebar carrying the needle and sliding in said head, the looper-shaft, and means for operating these parts, as specified, of the reciprocating feed-plate and sliding arm L to which it is attached, the pivoted lever M, Vibrating in a horizontal plane and engaging said arm, the pivoted lever N, which vibrates vertically for raising the feed-plate, and the cam G actuating both the aforesaid levers M N, as shown and described, whereby the needle is caused to make three strokes and the feed-plate one forward and two rearward movements in the same space of time, as and for the purpose set forth.

JAMES HEGGAN. WVitnesses:

E. R. PIERCE, R. H. BARNES. 

